CN110543672B - Simulation optimization system of heat supply network hydraulic working condition system - Google Patents
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Abstract
The invention discloses a simulation optimization system of a heat supply network hydraulic working condition system, which comprises a heat user module, a heat exchange module and a heat supply station module, wherein the heat user module is used for acquiring indoor temperature data and obtaining average indoor temperature data according to all the indoor temperature data; the heating station module is used for judging the relation between the average indoor temperature data and the conversion temperature value, if the average indoor temperature data is less than the conversion temperature value, the average indoor temperature data is adjusted to a comfortable room temperature, and if the average indoor temperature data is greater than the conversion temperature value, the average indoor temperature data is adjusted to the conversion temperature value; the heat exchange station module is used for transferring heat to the heat user module through the heat exchange module. The simulation optimization system of the embodiment changes the mode of directly transmitting the temperature of the heat user to the heating module, but adopts a negative feedback method to carry out overall dynamic adjustment, and the heat exchange module adjusts the heat supply condition of the heat user in real time according to the average indoor temperature data fed back by the heat user module.
Description
Technical Field
The invention belongs to the technical field of heat supply, and particularly relates to a simulation optimization system of a heat supply network hydraulic working condition system.
Background
In recent years, with the improvement of people's physical life, people pay more and more attention to indoor environment, especially indoor air quality and comfort. At present, in each northern city, a large-area central heating mode is adopted to provide heating for residents. The indoor temperature of a winter heating area is regulated to be 16-21 ℃ in China, and the indoor temperature is recommended to be kept at 16-28 ℃ all the year round in the standard of 'healthy houses' determined by the world health organization
At present, the central heating generally uses an axial flow pump to supply power to circulating water, so as to realize the heating for users. In order to improve the energy utilization rate of the hydraulic working condition system, heat supply according to needs is realized at the minimum cost, the problem of thermal imbalance of a heat supply system is solved, and how to guarantee timely meeting the load change requirements of users is solved.
However, the main cause of the thermal imbalance of the user is the hydraulic imbalance. The real heat supply network working condition system is huge, high in manufacturing cost and not beneficial to experimental research, so that a simulation system capable of simulating the heat supply network working condition system is needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a simulation optimization system of a heat supply network hydraulic working condition system, which comprises the following steps:
a simulation optimization system of a heat supply network hydraulic working condition system comprises: a heat consumer module, a heat exchange module and a heat supply station module, wherein,
the heat user module is used for acquiring indoor temperature data of a plurality of heat users, obtaining average indoor temperature data according to all the indoor temperature data and transmitting the average indoor temperature data to the heat exchange station module;
the heat exchange module is used for judging the relation between the average indoor temperature data and a conversion temperature value, if the average indoor temperature data is smaller than the conversion temperature value, the average indoor temperature data is adjusted to a comfortable room temperature, and if the average indoor temperature data is larger than the conversion temperature value, the average indoor temperature data is adjusted to the conversion temperature value;
the heat supply station module is used for heating and transmitting heat generated by heating to the heat user module through the heat exchange module.
In an embodiment of the present invention, the heat supply station module is further configured to determine a relationship between the average indoor temperature data and a set value, stop heating if the average indoor temperature data is greater than the set value, perform heating if the average indoor temperature data is less than the set value, and transmit heat generated by heating to the heat consumer module through the heat exchange module.
In one embodiment of the invention, the heat exchange module comprises a first heat exchanger, a second heat exchanger, a first pressurizing module, and a second pressurizing module, wherein,
the first end of the first heat exchanger is connected to the heating plant module, the second end of the first heat exchanger is connected to the first end of the first pressurizing module, the third end of the first heat exchanger is connected to the first end of the second heat exchanger, the second end of the second heat exchanger is connected to the second end of the first pressurizing module, the third end of the second heat exchanger is connected to the first end of the second pressurizing module, and the fourth end of the second heat exchanger is connected to the heat consumer module.
In one embodiment of the invention, the third end of the first heat exchanger is connected to the first end of the second heat exchanger by a pipe.
In one embodiment of the invention, the first pressurizing module comprises a first water flow speed simulation module, a first signal conversion module and a first water pump, wherein,
the first water flow speed simulation module, the first signal conversion module and the first water pump are sequentially connected, the first end of the first water pump is connected to the second end of the first heat exchanger, and the second end of the first water pump is connected to the second end of the second heat exchanger.
In one embodiment of the invention, the second pressurizing module comprises a second water flow speed simulation module, a second signal conversion module and a second water pump, wherein,
the second water flow speed simulation module, the second signal conversion module and the second water pump are sequentially connected, and the first end of the second water pump is connected to the third end of the second heat exchanger.
In one embodiment of the invention, the heat exchange module further comprises a gas agitation accumulator, wherein,
the gas stirring accumulator is connected to the third end of the first heat exchanger.
In an embodiment of the present invention, the heat consumer modules include a plurality of heat consumer simulation modules, a plurality of pipeline modules and an average value module, wherein each of the heat consumer simulation modules is connected to a corresponding pipeline module, each of the pipeline modules is connected to the fourth end of the second heat exchanger and the second end of the second pressurization module, and all of the heat consumer simulation modules are connected to the average value module at the same time, and the average value module is connected to the heat supply station module.
In one embodiment of the invention, the heating station module comprises a control module and a heating module, wherein,
the control module is connected to the average module and also connected to a heating module, and the heating module is connected to the first end of the first heat exchanger.
The invention has the beneficial effects that:
the whole heat supply network hydraulic working condition system adopts a negative feedback method to carry out overall dynamic adjustment, and the heat user module feeds back average indoor temperature data to the heat exchange station module in real time, so that the secondary network model of the heat exchange module is controlled to adjust the heat supply condition of the heat user in real time.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a simulation optimization system of a heat supply network hydraulic working condition system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a simulation optimization system of another heat supply network hydraulic working condition system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a simulation optimization system of a heat supply network hydraulic working condition system according to an embodiment of the present invention, which is capable of simulating a real thermodynamic system, and calculating ideal working conditions of the heat supply system under various load conditions by simulating pressure and flow changes of the heat supply network according to collected actual working conditions of the heat supply system under the condition of giving ideal flow of each thermodynamic station and heat consumer.
Specifically, the simulation optimization system of the present embodiment includes: a heat consumer module, a heat exchange module and a heat supply station module, wherein,
the heat user module is used for acquiring indoor temperature data of a plurality of heat users, obtaining average indoor temperature data according to all the indoor temperature data and transmitting the average indoor temperature data to the heat exchange station module;
the heat exchange module is used for judging the relation between the average indoor temperature data and the conversion temperature value, if the average indoor temperature data is less than the conversion temperature value, the average indoor temperature data is adjusted to a comfortable room temperature, and if the average indoor temperature data is greater than the conversion temperature value, the average indoor temperature data is adjusted to the conversion temperature value;
the heat supply station module is used for transmitting heat generated by heating to the heat user module through the heat exchange module;
the heat supply station module is also used for judging the relation between the average indoor temperature data and a set value, if the average indoor temperature data is larger than the set value, the heating is stopped, and if the average indoor temperature data is smaller than the set value, the heating is carried out, and the heat generated by the heating is transmitted to the heat user module through the heat exchange module.
The simulation optimization system can simulate the pressure and flow change of a heat supply network hydraulic working condition system according to the actual working condition of a heat supply system, and set the pressure and flow change conditions under the actual working condition in the simulation optimization system, so that the heat user module is utilized to collect the simulated indoor temperature data of heat users (each heat user corresponds to an indoor temperature), and calculate the simulated average indoor temperature data of all the heat users (namely the average value of the indoor temperatures of all the heat users), and transmit the indoor temperature data to the heat exchange module, the heat exchange module is used for converting the temperature of water transmitted by the heat supply station module into the temperature of water required by the heat user module, the temperature value of the water transmitted by the heat exchange module to the heat user module is the conversion temperature value, the heat exchange module can compare the received average indoor temperature data with the conversion temperature value of the water transmitted by the heat exchange module to the heat user module in real time, if the average indoor temperature data is less than the conversion temperature value, the heat exchanger of the heat exchange module increases the conversion temperature value until the average indoor temperature data is heated to a comfortable room temperature, i.e. a temperature suitable for human life, for example, 20-30 ℃, and the comfortable room temperature is greater than the conversion temperature value. The simulation optimization system of the heat supply network hydraulic working condition system of the embodiment directly adjusts the indoor temperature of the heat user through the heat exchange module and the real-time temperature fed back by the heat user module to the heat exchange module, so that the purpose of macroscopically regulating and controlling can be achieved, and the function of microscopically regulating can also be achieved.
The heat supply station module of the embodiment can provide heat for the heat exchange module, the heat supply station module can also compare the average indoor temperature data with the set value, if the average indoor temperature data is larger than the set value, the heat supply station module stops continuing to heat, the current temperature is kept unchanged, if the average indoor temperature data is smaller than the set value, the heat supply station module continues to heat, and when the heat supply station module needs to continue to heat, the heat generated by heating the heat supply station module is transmitted to the heat user corresponding to the heat user module through the secondary network model of the heat exchange module until the average indoor temperature data is larger than the set value.
In the simulation optimization system of the heat supply network hydraulic working condition system, the heat exchange module utilizes a secondary network model, centralization can be well achieved, the heat supply effect and the heat supply nodes can be improved through network hydraulic balance, the adjusting pressure of a heat supply station can be relieved, and the aims of heat supply balance, energy conservation and emission reduction can be better, faster and more efficiently achieved.
Example two
Referring to fig. 2, fig. 2 is a schematic structural diagram of another simulation optimization system of a heat supply network hydraulic working condition system according to an embodiment of the present invention. On the basis of the above embodiments, the embodiments of the present invention will specifically describe the heat consumer module, the heat supply station module, and the heat exchange module.
In one embodiment, the heat consumer module includes a plurality of heat consumer simulation modules 201, a plurality of pipeline modules 202 and an average module 203, wherein the heat consumer simulation modules 201 are configured to simulate a temperature variation condition of each heat consumer under pressure and flow conditions of actual conditions, the average module 203 is configured to calculate an average value of indoor temperatures of all the heat consumers, the heat consumer simulation modules 201 transmit indoor temperature data of each heat consumer to the average module 203 in real time, the average value of the indoor temperatures is fed back to the heat supply station module or the heat exchange module through the average module 203, each heat consumer simulation module 201 is correspondingly connected to one pipeline module 202, and the heat exchange module can transmit heat to the heat consumer simulation modules 201 through the pipeline modules 202, so as to achieve adjustment of the indoor temperatures.
In one embodiment, the heating station module includes a control module 301 and a heating module 302, wherein the heating module 302 may be a simulated fire, and the heating device is in the heating station module, the average value module 203 feeds back the average value of the indoor temperature to the control module 301, the control module 301 compares the average value with a set value, if the average value is higher than the set value in the control module 301, the control module 301 turns off a switch for continuing heating, and keeps the current temperature unchanged, if the average value is lower than the set value in the control module 301, if the control module 301 has turned off the heating switch, the heating switch is turned on again to perform heating processing through the heating module 302, and if the heating switch of the control module 301 is in an on state, the heating state is kept until the average value of the indoor temperature is higher than the set value in the control module 301.
In one embodiment, the heat exchange module includes a first heat exchanger 101, a second heat exchanger 102, a first pressurizing module and a second pressurizing module, wherein the heat supply station module performs a first temperature conversion on the water heated by the heat supply station module through the first heat exchanger 101, the first heat exchanger 101 transmits the water converted by the heat supply station module to the second heat exchanger 102 for a second temperature conversion, the temperature value of the water converted by the second heat exchanger 102 is a conversion temperature value, the average value module 203 can directly feed back the average value of the indoor temperature to the second heat exchanger 102, the second heat exchanger 102 compares the average value with the conversion temperature value of the second heat exchanger 102 in real time, if the average value is higher than the conversion temperature value, the second heat exchanger 102 keeps the current conversion temperature unchanged, if the average value is lower than the conversion temperature value in the second heat exchanger 102, the second heat exchanger 102 increases the temperature of the converted water, that is, the conversion temperature value, so that the average temperature value of the hot user module always meets the requirement of the hot user to ensure the heat degree of the indoor temperature of the hot user, meanwhile, the embodiment can also adjust the indoor temperature of the hot user through the control module 301, and when the heat exchanger 102 fails or the temperature is not adjusted in time, the control module 301 can adjust the indoor temperature of the hot user.
The first pressurizing module and the second pressurizing module can be water pumps, the first pressurizing module is used for pressurizing the first heat exchanger 101 so as to adjust the speed of the water flow provided by the first heat exchanger 101, and the second pressurizing module is used for pressurizing the second heat exchanger 102 so as to adjust the speed of the water flow provided by the second heat exchanger 102. The first and second pressurization modules may be simulated by FixedDisplacement modules, which provide conversion of mechanical energy into fluid flow. The pump can be operated in both forward and reverse directions, with ions parametrically selected by selecting leakage flow and friction torque, depending on the rotation of the shaft, and ports a and B of the first and second pressurizing modules are the hot liquid holding ports associated with the pump inlet and outlet. The embodiment can ensure that the simulation optimization system operates efficiently and saves energy by adopting the variable frequency speed regulation technology to control the flow of the water pump.
The embodiment ensures that the water flow in the fluid pipeline can simulate the water flow speed of the actual working condition through the first pressurizing module and the second pressurizing module, and can be adjusted in real time. The first heat exchanger 101 of the present embodiment is connected to the heating module 302, the heat generated by the heating module 302 is firstly transferred to the first heat exchanger 101, the first heat exchanger 101 transfers the fluid with a certain heat quantity to the second heat exchanger 102 at a certain flow rate, and the second heat exchanger 102 transfers the fluid with a certain heat quantity to the thermal user simulation module 201 at a certain flow rate. In the embodiment, the first heat exchanger 101 and the second heat exchanger 102 form a secondary network model, which can achieve decentralization well, improve the heating effect and heating nodes through hydraulic balance of a pipe network, and relieve the regulation pressure of a heating station.
Further, the first pressurizing module comprises a first water flow speed simulation module 104, a first signal conversion module 105 and a first water pump 106, wherein the first water flow speed simulation module 104 is used for simulating the water flow speed required by the first heat exchanger 101, the first signal conversion module 105 is used for converting the digital signal into a physical signal, and the first water pump 106 is used for maintaining the water flow in the fluid pipeline to meet the liquid flow rate provided by the first heat exchanger 101; the first water flow velocity simulation module 104 is used to set the liquid flow velocity required by the first heat exchanger 101 to the second heat exchanger 102, the first signal conversion module 105 is used to convert the digital signal of the first water flow velocity simulation module 104 into a physical signal, and the first water pump 106 is used to pressurize the liquid in the first heat exchanger 101 after receiving the physical signal, so that the liquid flows into the second heat exchanger 102 at a certain flow velocity.
Further, the second pressurizing module comprises a second water flow speed simulation module 107, a second signal conversion module 108 and a second water pump 109, wherein the second water flow speed simulation module 107 is used for simulating the water flow speed required by the second heat exchanger 102, the second signal conversion module 108 is used for converting the digital signal into a physical signal, and the second water pump 109 is used for maintaining the water flow in the fluid pipeline to meet the liquid flow rate provided by the second heat exchanger 102; the second water flow velocity simulation module 107 is used to set the liquid flow velocity required by the second heat exchanger 102 to the thermal user simulation module 201, the second signal conversion module 108 is used to convert the digital signal of the second water flow velocity simulation module 107 into a physical signal, and the second water pump 109, after receiving the physical signal, pressurizes the liquid in the second heat exchanger 102, so that the liquid flows into the thermal user simulation module 201 at a certain flow velocity.
The first pressurizing module and the second pressurizing module of the present embodiment may be provided in a plurality according to the actual simulated operating condition, and the present embodiment does not specifically limit the present embodiment.
In one embodiment, the heat exchange module further comprises a gas agitation accumulator 110, the gas agitation accumulator 110 corresponding to a simulation power supply device for supplying power to the simulation optimization system.
The heat exchange module of the embodiment isolates the heat supply station module and the heat user module, namely isolates a heat source and a heat user, and simulates a secondary heat supply network model, so that the temperature of the heat user can be conveniently regulated and controlled. In the in-service use process, the PLC controller can realize the quantitative adjustment of the system by controlling the temperature difference between the supply water and the return water of the secondary network, thereby reducing the cost of directly heating and transmitting heat for the heating plant.
The simulation optimization system of this embodiment adopts a negative feedback method to perform overall dynamic adjustment, that is, the heat supply rate of the heat supply station module is dynamically adjusted according to the heat information fed back by the heat user module. For example, in an actual thermodynamic system, information such as the indoor temperature of a heat user, the pressure of a pipe network, the exchange efficiency and the like can be collected in real time through a large number of different sensors, and the information is fed back to the control end of the heat supply station module, the heat exchange module and the adjusting secondary network model in real time, so that the heat supply condition of the heat user can be adjusted in real time. In addition, the simulation optimization system of the embodiment can also achieve the purpose of macroscopically regulating and controlling a large number of heat exchange stations connected in series through the received real-time feedback information, and the heat supply balance is achieved.
The simulation optimization system of the embodiment adjusts and sets the pressure and flow change of the heat supply network according to the working condition of the actual thermodynamic system, so that the ideal working condition of the heat supply system is simulated under the actual working condition. When the three-dimensional operation state of the thermodynamic system changes, the hydraulic balance state of the heat supply network can be analyzed and calculated, so that an adjusting scheme is formulated, the simulation optimization system can ensure that the heat in the thermodynamic system is relatively balanced, and the energy conservation is further realized.
The simulation optimization system of the embodiment can be designed in a simulation mode according to real working conditions, each module in an actual heat supply network working condition system and the interaction relation between the modules can be simulated really, and compared with a real thermodynamic system, the simulation optimization system is simple and convenient to operate and easy to expand, and is simple in structural design, convenient to use and high in universality.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (4)
1. A simulation optimization system of a heat supply network hydraulic working condition system is characterized by comprising: a heat consumer module, a heat exchange module and a heat supply station module, wherein,
the heat user module is used for acquiring indoor temperature data of a plurality of heat users, obtaining average indoor temperature data according to all the indoor temperature data and transmitting the average indoor temperature data to the heat exchange module;
the heat exchange module is used for judging the relation between the average indoor temperature data and a conversion temperature value, if the average indoor temperature data is smaller than the conversion temperature value, the average indoor temperature data is adjusted to a comfortable room temperature, and if the average indoor temperature data is larger than the conversion temperature value, the average indoor temperature data is adjusted to the conversion temperature value;
the heat supply station module is used for heating and transmitting heat generated by heating to the heat user module through the heat exchange module;
the heat supply station module is also used for judging the relation between the average indoor temperature data and a set value, if the average indoor temperature data is greater than the set value, the heating is stopped, if the average indoor temperature data is less than the set value, the heating is carried out, and the heat generated by the heating is transmitted to the heat user module through the heat exchange station by the heat exchange module;
the heat exchange module comprises a first heat exchanger (101), a second heat exchanger (102), a first pressurizing module and a second pressurizing module, wherein,
a first end of the first heat exchanger (101) is connected to the heating plant module, a second end of the first heat exchanger (101) is connected to a first end of the first pressurizing module, a third end of the first heat exchanger (101) is connected to a first end of the second heat exchanger (102), a second end of the second heat exchanger (102) is connected to a second end of the first pressurizing module, a third end of the second heat exchanger (102) is connected to a first end of the second pressurizing module, and a fourth end of the second heat exchanger (102) is connected to the heat consumer module, wherein a value of the temperature of the water converted by the second heat exchanger (102) is a converted temperature value;
the third end of the first heat exchanger (101) is connected to the first end of the second heat exchanger (102) through a pipeline (103);
the heat user modules comprise a plurality of heat user simulation modules (201), a plurality of pipeline modules (202) and an average value module (203), wherein each heat user simulation module (201) is correspondingly connected with one pipeline module (202), each pipeline module (202) is connected to the fourth end of the second heat exchanger (102) and the second end of the second pressurizing module, all the heat user simulation modules (201) are simultaneously connected with the average value module (203), and the average value module (203) is connected with the heat supply station module;
the heating plant module comprises a control module (301) and a heating module (302), wherein,
the control module (301) is connected to the average module (203) and also to a heating module (302), the heating module (302) being connected to a first end of the first heat exchanger (101).
2. The simulation optimization system of claim 1, wherein the first pressurizing module comprises a first water flow rate simulation module (104), a first signal conversion module (105), and a first water pump (106), wherein,
the first water flow speed simulation module (104), the first signal conversion module (105) and the first water pump (106) are sequentially connected, a first end of the first water pump (106) is connected to a second end of the first heat exchanger (101), and a second end of the first water pump (106) is connected to a second end of the second heat exchanger (102).
3. The simulation optimization system of claim 1, wherein the second pressurizing module comprises a second water flow rate simulation module (107), a second signal conversion module (108), and a second water pump (109), wherein,
the second water flow speed simulation module (107), the second signal conversion module (108) and the second water pump (109) are sequentially connected, and a first end of the second water pump (109) is connected to a third end of the second heat exchanger (102).
4. The simulation optimization system of claim 1, wherein the heat exchange module further comprises a gas agitation accumulator (110), wherein,
the gas stirring accumulator (110) is connected to the third end of the first heat exchanger (101).
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